MET metabolic equivalent, EORTC QLQ-C30 European organization for research and treatment of cancer quality of life questionnaire core 30, LS least-squares, CI confidence interval, EORTC QLQ-BR23 European organization for research and treatment of cancer quality of life questionnaire Breast cancer module 23

aP for trend was calculated using the median value of each tertile category as a continuous variable

bAdjusted for age (year: continuous), energy intake (kcal/day: continuous), dietary supplement use (yes, no), education level (high school or less, college or more), marital status (married or cohabitated, unmarried or divorced or widowed), time since surgery (6 month – 1 year, 1 year - 5 years, ≥5 years), and center